TM 10-3930-669-20 7-15.  MAIN POWER SWITCH REPLACEMENT. This task covers: a.  Removal b.  Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials/Parts Tags, Identification ( Item 21, Appendix C) Washer, Lock Washer, Lock (2) Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Engine access panel opened (TM 10-3930-669-10) Batteries disconnected (Para 7-48) a.  Removal (1) Lift back two terminal covers (1) on two terminals (2 and 3). NOTE Tag and mark all wires prior to removal. (2) Remove nut (4), lock washer (5), and four wires (6) from terminal (2).  Discard lock washer. (3) Remove nut (7), lock washer (8), and wire (9) from terminal (3).  Discard lock washer. 7-33